Electric gas-lighting apparatus



(Nq Model.)

J. P. TIRRELL ELBGTRIG GAS LIGHTING APPARATUS.

edJuly 11,1882."

lr yer km w UNITED STATES PATENT OFFICE.

JACOB P. TIRRELL, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE ELEG- TRIO GAS LIGHTING COMPANY, OF PORTLAND, MAINE.

ELECTRIC GAS- LIGHTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 260,804, dated July 11, 1882,

Application filed January 16, 1882. (No model.) i

To all whom 1t may. concern Be it known that I, JACOB l. TIRRELL, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and usevful Improvements in Electric Gas-Lighting Apparatus; and I do hereby declare that the represents a longitudinal sectional elevation through the center of the gas-cock; and Fig. 5 represents a longitudinal section on the line i A B, as seen from Y in Fig. 4.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

ct represents the burner, with its lava or other tip, I), at the top, as usual, and c represents the ordinary four-way stop-cock.

a is the central'perforation through the burner a. Y

(Z is a band of suitable insulating material placed around the top-of the burner at, around which insulator is secured the metallic ring 6 by means of the screw 6.

e is a platinum point attached to and in metallic connection with the metal ring e, as shown. Y

e is a wire leading from a spark-coil and galvanic battery of any of the usual kinds.

To the forward end of the cock 0 is secured, or made in one piece with it, a ratchet-wheel or toothed wheel, 0, as shown.

Outside of the ratchet-wheel c is a lever, f, loosely hinged on the shank c of the cock 0.

c' is a screw screwed into the forward end of the gas-cock, and provided with a head, so

as to prevent thelever f from getting detached from the cock 0 when the apparatus is in use.

9 is a pawl hinged to the lever f at g, and having its lower end adapted to engage with the ratchet-wheel o to turn the gas-cock c, and to open it to allow the gas to pass out at the tip by turning the lever f to the position as shown in Fig. 2, which may be done, by the pulling downward of the eye g of the pawl g.

f and f are cam faces or projections on the lever f, between which projections is a recess, f, as shown.

h is a stop-pin secured to the burner a, and f f are stop-projections on the lever f to limit its throw when turned in either direction on its fulcrum.

k is a ground-connected lever having platinum point in its upper end, opposite the insulated platinumpoint e at the tip of the burner. The lever 70 is hung to the burner to in its lower end by means of the set-screw k, which latter serves as a fulcrum on which the lever is may rock slightly. The lever his provided with a side projection, k, which rests against the cam-facef when the lever f is in its normal position, as shown in Fig. 1.

l is a wire spring attached to stop-pin h, and having one of its free ends pressing on the outside of lever 7001' its projection 70', and after passing round the cock 0 its other end is attached in a suitable manner to the upper end of the lever f.

f is a lip in the upper end of the lever f, which serves as a 'stop for the upper end of the pawl g, so as to prevent the lower end of said pawl from moving too far from the teeth of the ratchet c.

The operation is as follows: The normalpon tions of the various parts are represented in Fig. 1, and the wire 6' is supposed to be in electrical connection with a suitable spark-coil and its electric battery, the projection is of the lever 70 being held by the influence of the springwire tagainst the cam-face f andthe electrode is held away from the insulated electrode 6, as shown, the lever f being held by the influence of; the spring lin such a manner that the stoppin h serves as a stop against the stop-projectionf"? on said lever f. To turn on the gas and to light it, it is only necessary to pull on the eye g.

of the pawl 9, when its lower end comes in contact with the ratchet-wheel c, and thereby causes the cock 0 to be sulficiently open to allow the gas to pass out at the tip b of the burner, and with it the leverf is turned on its fulcrum c, and when it reaches the position as shown in Fig. 2 the spring I forces the lever k inward, so that its platinum point It comes in contact with the insulated electrode 0, and thus closes the circuit from the battery, the lever 70 and burner a serving as ground-connections. It, now, the leverfis turned a little farther, its cam-projectionf will force thelever k outward by coming in contact with the projection k, and thereby disconnect the electrode 7; from the insulated electrode 0, causing a spark to pass between them in breaking the circnit. By letting go the hold of the pawl-eye g the electrodes k e are again broughtin contact and again disconnected by the contact of projection f with lever-projection k, causing the circuit a second time to be broken and a second spark to pass between the electrodes 0 k, and this return to the normal position of the leverfis done by the influence of the wire spring l, during which return motion of the lever f its pawl 9 passes freely by the teeth of the ratchet-wheel c, leaving the cock open and the gas burning. The gas is extinguished and the cock closed by pulling down the leverfin the same manner as bylightingit,whenitremains closed until the leverf and pawl g are again operated, as above described.

Heretofore electric gas-lighting apparatus have been made with a lever on the gas-cock and a pawl jointed to said lever, which pawl, by the influence of a spring acting directly on it, is caused to engage in the teeth of a ratchetwheel on the stop-cock when the lever is pulled down; but such is not my invention, as I employ instead a loosely-hinged pawl, g, hinged to the lever f, supported loosely on the gascock spindle c, and the cock 0 is turned by manipulation of the said pawl g, causing its lower end to act on the ratchet-wheel o, and thus to turn the gas-cock for the admission of gas to the top of the burner.

1 am aware of the patents granted respectively to Sanford, September 14, 1880, N 0. 232,304, and to Tirrell, July 16, 1878, No. 206,057, and I desire to state that I do not claim combinations and arrangements as therein shown and described; but

What I wish to secure by Letters Patent, and claim, is-

1. In a gas-ligh ting apparatus, the combination of burner a and insulated electrode 0, lever f, pawl g, ratchet-wheel 0, spring I, surrounding the stop-eock and acting in one end on leverf and in the other onleverk, the lever k, and its electrode 70, as described.

2. In a gas-lightingapparatus,the combination of leverf, pawl or leverg, and spring Z, surrounding the stop-cock and acting in one end on lever fand in its other end on lever k, as described.

3. In a gas-lighting apparatus, the leverf, with its cam-faces f f f, in combination with lever k, its projection k, and the spring I, surrounding the stop-cock and acting in one end on lever fand in its other end on lever is, as set forth and described.

In testimony whereof I have afiixed my signature in presence of two witnesses.

JACOB I. TIRRELL.

Witnesses:

ALBAN ANDREN, HENRY UHADBOURN. 

